Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Cambrian creatures in a colorful explosion A cursory flip through any high school biology textbook will ...

Experts analyzed 170 trace fossils from millions of years before the Cambrian Period and assert that advanced features may ...

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A research team at Yunnan University has resolved a longstanding mystery regarding Earth’s earliest vertebrates, revealing ...

How ancient bryozoans may have looked. (Zhifei Zhang) The Cambrian explosion was one of the most dramatic chapters in the history of evolution. Around 540 million years ago, a sudden, astonishing ...

Biomechanical studies on the arachnid-like front "legs" of an extinct apex predator show that the 2-foot (60 centimeter) marine animal Anomalocaris canadensis was likely much weaker than once assumed.

The control system that may have emerged at the Cambrian explosion is known as HIF-1α (hypoxia-inducible factor 1). In modern animals, this system helps cells detect and adapt to changes in oxygen ...

Five hundred million years ago, tacos existed. But they weren’t corn or flour; they were the hard-shelled coverings on a now-extinct sea creature, Odaraia alata. According to new research, the ...

A newly described species from the Burgess Shale had three eyes, clawed limbs, and a tail full of gills—plus internal organs preserved in stunning detail. Reading time 3 minutes A newly described ...

Learn more about a time period marked by an intense burst of evolution. 3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. The Cambrian ...